Place guide · Mayreau
Tobago Cays
Tobago CaysA group of four uninhabited coral cays in the southern Grenadines, enclosed by a horseshoe reef and backed by a long white-sand beach, widely regarded as the finest sailing anchorage and snorkelling site in the eastern Caribbean.
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A closer look
The Tobago Cays are four uninhabited coral islands—Petit Tabac, Baradal, Petit Rameau and Jamesby—clustered in the southern Grenadines channel between St. Vincent and Grenada, and they are best understood as a complete marine ecosystem rather than merely a scenic backdrop, with the reef, lagoon, seagrass beds and sandy shores functioning as interconnected habitats for a diverse range of species.
A horseshoe-shaped barrier reef encircles the cays on three sides, leaving a broad shallow lagoon between 1 and 4 metres deep in the centre that is the anchorage for sailing yachts and the snorkelling playground for visitors arriving by charter boat or day-cruiser from Union Island, which lies approximately 20 minutes away by dinghy.
Within the lagoon, dense stands of elkhorn and staghorn coral rise from the sandy bottom in water so clear that from the surface you can watch reef fish navigating the branching structures below, while green and hawksbill sea turtles graze on the seagrass patches that dot the lagoon floor, often approaching snorkellers with apparent curiosity in the early morning hours.
The long white-sand beach along the eastern shore of the cays is one of the most photographed in the Caribbean, a wide expanse of talcum-soft sand backed by casuarina trees whose branches provide shade at mid-day and whose extensive root systems stabilise the dune against the prevailing Atlantic swell that can build significantly by afternoon.
Sailing into the cays under spinnaker in a steady 15-knot tradewind is considered a bucket-list experience for Caribbean sailors; the approach from the west through the wide channel is straightforward in settled weather and the anchorage holds well in sand with good scope, though the open western approach can be uncomfortable in a northerly swell.
The nearby island of Union Island, a 20-minute dinghy ride away, provides the support infrastructure—fuel, provisions, restaurants and an airport with flights to St. Vincent and Barbados—needed to make the Tobago Cays accessible as a day destination or as a base for a multi-day sailing itinerary through the Grenadines.
Night sailing in the channel is not recommended for unfamiliar skippers because the approach channels are unmarked and the swell can increase significantly after dark, but daytime access by powerboat or catamaran from Union Island is straightforward and widely available through the several charter operators based there.
The Tobago Cays Marine Park fee is payable on anchoring and landing, and the revenue supports a reef monitoring programme that maintains water-quality testing stations at three points in the lagoon and tracks coral health indicators seasonally throughout the year.
The horseshoe reef encloses a calm, shallow lagoon with exceptional water clarity and vibrant coral and marine life, making it the premier snorkelling anchorage in the Windward Islands.
Sailing into the cays under tradewind conditions is widely regarded as one of the finest cruising experiences in the Caribbean.
The beach is consistently rated among the most beautiful in the eastern Caribbean, with fine white sand and shallow warm water.
Before you go
Current details checked July 2026
- Best season
- January to April offers the calmest lagoon conditions and clearest water; August and September bring the heaviest swell and roughest access.
The cays are best reached during the dry season when tradewinds are steady but the lagoon surface remains smooth.
Editorial guidance - Before you go 1
- Bring reef-safe sunscreen, ample drinking water and snacks; there are no facilities on the cays themselves.Editorial guidance
- Before you go 2
- The best snorkelling is on the outer slope of the horseshoe reef; access requires a short swim or dinghy ride from the anchorage.Editorial guidance
- Before you go 3
- Book accommodation on Union Island or a charter yacht well in advance for the December-to-April high season.Editorial guidance
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Practical notes
Note 1
The Tobago Cays are four uninhabited coral cays in the Grenadines, administered as a marine park within St. Vincent and the Grenadines.
Note 2
They are enclosed by a horseshoe-shaped barrier reef that forms a calm shallow lagoon with depths of 1–4 metres.
Note 3
Access is by private boat or organised day-cruise from Union Island, approximately 20 minutes away.
Note 4
2026 park fees and anchoring regulations are not pinned in this batch.